AeroSpace doesn't detect "Welcome to Xcode" window (with AXUnknown role)

[claybridges]

λ sw_vers -productVersion
macOS 26.4

λ bin/aerospace --version
aerospace CLI client version: 0.20.3-Beta 6dde91ba43f62b407b2faf3739b837318266e077
AeroSpace.app server version: 0.20.3-Beta 6dde91ba43f62b407b2faf3739b837318266e077

Xcode's "Welcome to Xcode" window is invisible to aerospace list-windows. Therefore, it does not get moved to the correct space with Xcode.

Workaround: Disable the welcome window in Xcode → Settings → General → uncheck "Show welcome window on launch".

Steps to reproduce 1

1. Xcode → Settings → General → check "Show welcome window on launch"
2. Close Xcode.
3. Map Xcode to space 2:

on-window-detected = [
    {if.app-id = 'com.apple.dt.Xcode', run = ['layout floating', 'move-node-to-workspace 2']},
]

2. Reload config.
3. Start Xcode in space 1.

Expected results: All Xcode windows move to space 2.
Actual results: "Welcome to Xcode" remains in space 1.

Steps to reproduce 2

1. Xcode → Settings → General → check "Show welcome window on launch"
2. Close Xcode, and relaunch.
3. Run aerospace list-windows --all.

Expected results: "Welcome to Xcode" window is listed.
Actual results: Not listed.

Probable cause

aerospace debug-windows output for the Welcome window (trimmed):

"AXRole" : "AXWindow",
"AXSubrole" : "AXUnknown",
"AXTitle" : "Welcome to Xcode",
"AXIdentifier" : "Welcome",
"AXMain" : 0,
"AXModal" : 0,
"AXCloseButton" : null,
"AXMinimizeButton" : null,
"AXFullScreenButton" : null,
"Aero.AxUiElementWindowType" : "popup",
"Aero.AxUiElementWindowType_isDialogHeuristic" : true,
"Aero.treeNodeParent" : "Optional(AppBundle.MacosPopupWindowsContainer)",
"Aero.workspace" : null,

AeroSpace classifies this window as a popup (via dialog heuristic) due to AXSubrole: AXUnknown, and places it in MacosPopupWindowsContainer instead of a workspace. This means on-window-detected rules cannot manage it and list-windows does not show it.

[claybridges]

New user, huge fan. I'm an Apple Dev (mostly iOS). I'll try to find some weekend/nights time to put together a general answer to this and #1820.